HIGHLEAD GC20528-BDZA Gebruiksaanwijzing - Pagina 10
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Pagina afdrukken19.ADJUSTMENT OF FEED DOG HEIGHT
Height of feed dog and pressure of presser foot should be adjusted for
individual fabric(s) with the following cautions:
（1）Fabric will be damaged if the feed dog extends too high,or pressure
foot is too large.
（2）Even stitch length cannot be assured if the feed dog is too low or
pressure foot is too small.
（3）Feed dog height should be measured at the point where the needle is
at the top position.
For light fabrics: Approx. 0.8mm from throat plate
For usual fabrics: Approx. 1.0mm from throat plate
For heavy fabrics:Apporx.1.2mm from throat plate
Adjustment procedure
a.Lean the machine head backward.
b.Turn the pulley by hand and stop when the feed dog rises to the
maximum height.
c.Loosen the feed bar set screw.
d.Vertically move the feed bar(in the direction indicated by arrow in the
figure)to adjust it to adequate height.
e.After the adjustment,tighten the feed bar set screw.
The feed dog height is factory-adjusted to 1.0mm.
20.RELATIONSHIP BETWEEN ROTATING HOOK MOTION AND
TAKE-UP LEVER MOTION
When the timing belt was removed for its replacement,for
example,the relationship between relating hook motion and
take-up lever motion should be adjusted as follows:
（1）Turn the balance wheel and stop when the take-up
lever is lifed to its upper dead point.
（2）Lean the machine head backward and make sure
the arrow(timing mark)put on the timing belt is in line with
the black line on the boss of lower shaft.
（3）If the timing mark is not in the line with the black,
remove the timing belt and install it again to adjust.
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